Opposed-roll crusher with interlocking teeth of graduated heights



' v 2,474,625 ERLOCKING ms T. G. GEROW OLL CRUSHER WITH INT TH June 28, 1949.

- OPPOSEDR TEE OF GRADUATED 1mm led May 14, 1945 Patented June 28, 1949 UNITED STATES- OPPOSED-ROLL oRUsHER WITH, IN-

TERLOCKING TEETHQF GRADUATED arrears Theron G. Gerow, Chicago, Ill; Application May 14, 1945, Serial No. teats? This invention relates to an adjustable '011 crusher having teeth continuous-1y graduated in height from one end to-the other. 3

Among the objects of my invention isto provide a roli crusher soconstructed as to allow greater flexibilityuofroll adjustment, to produce an aggregate having mixed different sizes. My rollers have teeth varying in height with the largest teeth at one end graduating continuously to the smallest teeth at the opposite end. My rollers are adjustable so that the top size of the ground product may be accurately determined and produced with the further advantage that my rollers also produce varying-smaller sizes along with the top size to provide an aggregate having mixed different sizes. This aggregate having mixed different sizes is of particular importance where the produce ground is coal, because it is often desirable in stokers and other devices that the coal be of varying sizes for maximum burning efficiency.

My invention also contemplates such other objects, advantages and capabilities as will later more fully appear and which are inherently possessed by my invention.

While I have shown in the accompanying drawings a preferred embodiment of my invention, yet it is to be understood that the same is susceptible of modification and change without departing from the spirit of my invention.

Referring to the drawings, Fig. l is a to plan view partly in section, of a roll crusher embodying my invention; Fig. 2 is a side elevational View partly in section with the hopper; Fig. 3 is a detailed sectional view of the breaker segments and diaphragm; Fig. 4 is an enlarged detailed sectional view of the breaker teeth; Fig. 5 is a detailed sectional view on line 55 of Fig. 1 and Fig. 6 is a detailed sectional view on line 6'5 of Fig. 1.

The embodiment selected to illustrate my invention comprises a main frame H], on which are mounted two pairs of spaced bearing supports I l. Mounted on each of said supports l i, is a bearing 12. Extending between oppositely spaced bearings I2 are shafts l3 rotatably mounted thereon. Rot-atably carried by each of the two shafts is a roller l4.

Each of the shafts I3 is engaged at one end by a bevel gear l5. Said bevel "gear l5, mesh with bevel pinions I6, which are connected to and moved by a drive shaft 11 connected to a suitable source of power.

Three of my four bearing supports II, are slidably mounted on the frame and one is fixed 2 Claims. (Cl. air-234i to the frame.- The slidably mounted supports H, each have a threaded bolt l8, a lock nut l9', a spring 20', and a spring nut 2| as shown in Figs. 1 and 2. This construction permits th rollers Hi to be moved to and from each other to a desired relative position. Bracket 27 is movable with adjacent bearing [2, while gear H5 is splined :at 29 in longitudinally slidable position on shaft l'l. Shaft It shown on the right in Fig. 1 maybe adjusted. springs 2;0 are adapted to act as cushions, because bearings 12 are not too rigidly attached to supports ll. This permits the rollers 14' to spread apart slightly against springs 20, when a larger piece of coal passes through rollers M.

In Fig. 5, as shown more in detail, spline 28 is set in shaft I! and acts as a key to drive gear 8. In Fig. 6 as shown more in detail, bearing I2 is adjustably mounted on bracket 2'], and bracket 27 is movable with hearing l2 against spring 20.

My rollers 14 are formed with a plurality of segments or staves 22, attached by bolts 21', extending through slots 28 to the diaphragm 23, the web 24, of which extends to hub 25 which engages the shaft l3.

Said rollers I 4 are positioned opposite each other and are spaced relative to each other as desired by the slidable adjustment of said slidably mounted bearing supports ll. Said rollers Id have interlocking teeth 26 graduated from the highest at one end to the lowest at the other end, with the largest tooth of one roller opposite the largest tooth of the other roller, the smallest tooth of one roller opposite the smallest tooth of the other roller and the intermediate teeth of graduate size of one roller opposite the intermediary teeth of corresponding size of the other roller, said rollers adapted to crush coal with said teeth to produce coal having some pieces of desired maximum size with other pieces of a smaller size to produce an aggregate having mixed different sizes for maximum burning efficiency.

Having thus described my invention, I claim:

1. A roll crusher for coal comprising a frame, two pairs of spaced bearing supports mounted on said frame with three of said supports slidably adjustable on said frame and the other of said supports fixed to said frame, bearings mounted on said supports, a pair of shafts rotatably mounted on opposite bearings, a roller rotatably carried by each of said shafts, said rollers positioned opposite each other, and spaced relative to each other :as desired, by the slidable adjustment of said slidably mounted bearing supports, said rollers having interlocking teeth graduated other end, with the largest tooth of one roller.

opposite the largest tooth of the other roller, the smallest tooth of one roller opposite the smallest tooth of the other roller and the intermediate teeth of graduate sizes of one roller opposite the intermediary teeth of corresponding sizes of the other roller, said rollers adapted to; crush coal with said teeth to produce coal having some pieces of desired maximum size with other pieces of a smaller size to produce an aggregate having mixed different sizes for maximum burning ef- 2. A coal crushing device comprising a, frame, two pairs of spaced Ibearing supports mounted on said frame, with three of said supports slidably adjustable on said frame, and the other of said supports fixed to said frame, means for holding said supports in desired adjusted position, bearings mounted on said supports, a pair of shafts rotatably mounted on opposite bearings, a roller rotatably carried by each of said shafts, said rollers positioned opposite each other, and spaced relative to each other as desired by the slidable adjustment of said slidably mounted supports, means for driving said shafts and moving the opposed rollers clockwise and counter-clockwise respectively, said rollers having interlocking teeth, said teeth on each roller being graduated from the highest on one end tothe lowest on the other end, with the largest tooth of one roller opposite the largest tooth 0f the other roller, the smallest tooth of one roller opposite the smallest tooth of the other roller and the .4 intermediate teeth of graduate sizes of one roller opposite the intermediary teeth of corresponding sizes of the other roller, said spaced rollers adapted to receive coal dropped between them and said teeth adapted to crush said coal as it passes between the rollers to produce coal having some pieces of desired maximum size with other pieces of a smaller size to produce an aggregate having mixed different sizes for maximum burning efiicienoy.

THERON G. GEROW.

REFERENCES CITED The following referenlces are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 48,224 Umgollz June 13, 1865 777,448 Sturtevant Dec. 13, 1904 853,066 Crellin May 7, 1907 996,958 Wallick Jul 4, 1911 1,079,301 Lloyd Nov. 18, 1913 1,356,291 Kennedy Oct. 19, 1920 1,628,099 Arrowood May 10, 1927 FOREIGN PATENTS Number Country Date 1,613 Great Britain 1876 12,451 Great Britain Sept. 14, 1887 20,481 France Mar. 8, 1918 143,746 Germany Aug. 28, 1903 417,176 France Aug. 23, 1910 539,846 France Apr. 7, 1922 

